Carbon scraper for piston-ring grooves



Jan. 3, 1928.

l-lvs. ALBERT.

CARBON SCRAPER FOR PISTON RING GRQUVES Original Filed Aug. 30. v1926-uulnll MINI I I iii/1&6

Witness Q, Mu

Manage Patented Jan. 3,1928.

2- UNITED PATENT .oFFicE.

Henna-s. ALBERT, on MERCER-PENNSYLVANIA;

"- cannon sonarnn non PISTON-RING enoovns.

1 Application filed' august 30,1926, Serial N0. 132,519. Renewed-June--30, 1e27.--

The invention aims to provide a new and improved scraper for the purposeof removing carbon from piston ring grooves, the device being of suchnature that it is 5 simple and inexpensive, yet is efiicient and verydesirable for use upon pistons of numerous sizes.

-With the foregoing in view, the invention resides in the novel subjectmatter herein- 1 after described. and claimed, the description beingsupplemented by the accompanying drawing. v

Fig. 1 is an elevation of the tool and a sectional view through a pistonshowing the manner of using the device in cleaning the carbon from aring groove of said piston.

Fig. 2 is an edge view of the tool.

Fig. 3 is a. transverse sectional view on line 3-3 of Fig. 1.

Fig. 4. is a disassembled perspective view of certain elements of thedevice, to be hereinafter described.

In the form of construction selected for illustration in the presentapplication, the numerals 5 and 6 designate two flat metal bars disposedin crossed relation and pivoted together at 7 the portions of the barsin ad vance of the pivot being shaped to straddle a piston P, saidportion of one of the bars being then receivable in any of the ringgrooves G of said piston, while carbon scraping means carried by saidportion of the other bar, is then also engageable with the groove. Thus,by grasping the rear or handle portions of the bars 5 and 6 and turningthe device about the piston or turning the latter within the device, allcarbon may be quickly and easily removed from the ring groove, and aftercleaning one groove, the other grooves may be successively cleaned inthe same manner.

The numeral 8 designates a V-shaped scraper whose ends are. suitablysharpened at 9 to engage the bottoms and sides of the ring grooves. Thisscraper lies upon one fiat side of the bar 5, at the front end of thelatter and the two ends of said scraper project inwardly from the inneredge of said bar 5. A metal plate 10 contacts with the side of thescraper 8, remote from the side which contacts with the bar 5, saidplate and bar being formed with registering openings 11 and 12. A screw13 or some analogous fastener passes through these openings and isreceived in the crotch of the scraper 8. At one end, the plate 10 hascorner portions 14 bent laterally to engage.

Thus, turning of the plate 10 with respect to the bar 5 is prevented andany turning of the scraper with respect to said plate is prevented, andas the flanges 14 hold the scraper 8 against movement in one direction,

. and the screw 13 holds it against movement in the other direction, itwill be seen that the scraper is rigidly yet detachably secured. to thebar 5.

With each tool, a set of scrapers of differ ent thicknesses, may befurnished. Thus, a scraper of the necessary thickness for any width ofring groove, may be applied to the bar 5, and quick and easy interchangefrom a scraperof one thickness to one of another, maybe effected.

Excellent results have been obtained from the details disclosed and theyare therefore preferably followed. However, within the scope of theinvention as claimed, variations may be made.

I'claim:

1. In a carbon scraper for piston ring grooves, a scraper-carryingmember, a V- shap'ed scraper lying against said carrying member andhaving its ends projecting therefrom, a plate lying against the side ofsaid scraper remote from the carrying member, a fastener passing throughsaid plate and said carrying member and disposed in the crotch of'saidscraper, and means on said plate abutting the outer edge of said scraperto I hold it against sliding with respect to said plate. i

2. In a carbon scraper for piston ring grooves, a scraper-carryingmember, a V- shaped scraper lying against said carrying member andhaving its ends projecting therefrom, a plate lying against the side ofsaid scraper remote from thecarrying member, a fastener passing throughsaid plate and said carrying member and disposed in the crotch of saidscraper, means on said plate abutting the outeredge of said scraper toprevent sliding of the latter with respect to the plate, and

means on said plate abutting an edge of said carrying member to "preventturning of the plate about said fastener. a

3. A structure as specified in claim 2;

5 said edge-abutting means consisting of flanges bent laterally fromsaid plate.

4. A structure as specified in claim 2; said edge-abutting meansconsisting of flanges affixed my signature.

'ber having its ends in contact with the inner edge of the scraper toprevent turning of the latter about said fastener.

V, In testimony whereof I have hereunto HOMER S; ALBERT.

